soft
at rest
calm
chastened
cloistered
closet
confidential
constrained
controlled
cool
dwindling
ebbing
echoless
even-tenored
halcyon
hush as death
impassive
in control
in hand
inaudible
inside
isolated
limited
moldering
mousy
muted
noiseless
pacific
peaceable
peaceful
placid
quelled
quiescent
quiet
reposeful
reposing
restful
resting
restrained
secluded
sequestered
sequestrated
sheltered
silent
smooth
softened
soundless
stable
still
still as death
stillish
blushed
brushed
crushed
flushed
gushed
rushed